发明名称 |
Multimotor variable frequency overload |
摘要 |
An apparatus for protecting a motor includes two or more motor overloads, within a motor overload enclosure, protecting two or more motors. Each motor overload includes one or more current sensors where each current sensor includes a magnetic core and each current sensor includes a conductor positioned within the magnetic core where the conductor providing power to a motor protected by the two or more motor overloads (``protected motor"). Each motor overload includes a motor trip module that stops current flow to the protected motor in response determining that a thermal state of the protected motor has reached a thermal limit. Determining that the protected motor has reached a thermal limit includes using a current signal from at least one current sensor of the one or more current sensors that current of the protected motor to determine a thermal state of the protected motor. |
申请公布号 |
EP2779343(A3) |
申请公布日期 |
2014.11.05 |
申请号 |
EP20140155116 |
申请日期 |
2014.02.14 |
申请人 |
ROCKWELL AUTOMATION TECHNOLOGIES, INC. |
发明人 |
BLAKELY, JOHN;HELTON, GREGORY A.;INNES, MARK |
分类号 |
H02H6/00;G01R31/34;H02H3/00;H02H7/085;H02P29/00 |
主分类号 |
H02H6/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|